Shampoo sink cushion



FIG. 1 is a perspective view of my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side view being a mirror image;

FIG. 5 is top view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for the shampoo sink cushion, as shown and described. 